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Jurnal Geografi LIngkungan Tropik (Journal of Geography of Tropical Environments)
Published by Universitas Indonesia
ISSN : -     EISSN : 25979949     DOI : 10.7454/jglitrop
Core Subject : Science,
Earth & Planetary Sciences
JGLITROP is a scientific journal published by Department of Geography at the University of Indonesia focuses on the application of Geography in tropical environment. The focus of the issues consist of: Physical Geography Human Geography Remote Sensing Geographic Information System Environmental Sciences Multidiscipline/Others
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 70 Documents
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DISTRIBUTION OF HEAVY METALS, SOIL MICROBIAL ENZYMES AND THEIR RELATIONSHIP IN KANO, NORTHWESTERN NIGERIA Mohammed, Mansur Abdul; Olowolafe, Emmanuel Adewale
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 4, No. 2
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The increase in population and industrial growth has led to increased production of industrial and domestic waste which contain heavy metals in various forms. Therefore, affect the diversity and activities of soil microbes and subsequently affect environmental sustainability. This research aimed at assessing the distribution of heavy metals, soil enzymes, and evaluate the functional relationship if any. The study area was divided into two locations as contaminated and control; thus, each location one square kilometre was demarcated and divided into 25 small square (grid). A Sample was collected in each grid from 0 – 15 cm depth using point composite sampling technique. The properties investigated are heavy metals, enzymes, pH, and soil temperature. The results of the analyses were subjected to statistical analyses to undertake one-way analysis of variance, and a t-test of means at �� value of <0.05, also correlation, and regression at a P<0.05 significant level. The results revealed that there is a gradual accumulation of all heavy metals and the concentration is higher in the contaminated than control locations. The soil is potentially polluted with Cd is clean from Cr, Fe, Mn, Zn, Pb, and Cu. High values of heavy metals were discovered in the dry season than the wet season due to rainfall which enhanced the dissolution, leaching, and runoff of heavy metals which is capable of removing the metals from the subsurface. High pH and temperature in the contaminated location influenced the toxicity and microbial activity respectively, this results in high enzymatic activity in the contaminated location. Favourable environmental conditions in the wet season led to the higher activity of the enzymes than the dry season. The finding also revealed that phosphatase and urease were negatively correlated with Cd and Ni. Inversely, dehydrogenase was negatively correlated with Ni and Zn. It was concluded that the determination of the heavy metals and enzymes reflects the microbial activities in soils and is considered as soil quality indicators.
SUITABILITY LOCATION FOR INCLUSIVE HIGH SCHOOL IN BEKASI CITY WEST JAVA PROVINCE BASED ON SCHOOL CAPACITY Hasanah, Galuh Izma; Nurlambang, Triarko; Zulkarnain, Faris
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 5, No. 1
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The development of inclusive education provider school must also be supported by the provision of good and optimal education facilities. In this study an evaluation was conducted on senior high school (SMA) located in three (3) sub-district areas in Bekasi City, namely Kecamatan Medan Satria, Kecamatan Jatiasih , and Kecamatan Bekasi Utara. These three areas were selected based on the percentage of the availability of the highest educational facilities in Bekasi. The Determination of location was chosen based on consideration through the site of school capacity variables based on the quantitative method. The results showed school characteristics can be seen as quality of the capacity for each school. In this study, it can be seen that schools can accommodate 1-7 study groups on average, the proportion of facilities and infrastructure for children with special needs reaches 55.5%. The research showed that the calculation of school's capacity resulted in 20% of total number of schools in suitable criteria, 27% of schools that were in moderately suitable criteria, 50% were in less suitable criteria, and only 3% of schools were in marginally suitable criteria
EFFECTS OF HUMAN ACTIVITIES ON THE AFAKA AFFORESTATION PROJECT, KADUNA NORTH, KADUNA STATE, NIGERIA Jibril, Mamman Shaba; Ariyo, Mary Oluyemisi; Butu, Ali Williams; Emeribe, Chukwudi Nnaemeka
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 5, No. 2
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The study aimed to investigate the effects of human activities on the Afaka afforestation project, Kaduna State, Nigeria. Structured interview was used to evaluate the level of community involvement in the modification of the forest project, their perceived environmental effects of landcover loss. Landsat images of 1986, 1999 and Sentinel-2 image of 2017 were applied for detection of changes in land use/land cover over the years (1986-2017). The study found that the land cover structure of the forest reserve has changed significantly. In 1986, area under crop cultivation was 19.24%, built-up areas, 0.08%, disturbed forest, 7.57%, gully, 2.60%, riparian vegetation, 2.78% and undisturbed forest, 61.49%. However, by 2017, there were significant changes as the area under crop cultivation 41.18%, built-up areas 0.17%, disturbed forest, 43.17%, gully 5.6%, riparian vegetation 4.66% and undisturbed forest, 1.66%, implying intensive human impacts on the Kaduna Afforestation project in recent time. This could be traced to the increased level of poverty in the community as 75% of the respondents who cannot afford alternative energy supplies such as kerosene and National grid-based electricity, rely on felling of trees for cooking. On the perceived effects of the afforestation project modification, reduced plantation size was 60.5%, decreased soil fertility 19.5%, reduced non-timber products, 11.1%, sheet erosion 6.1%, while flooding 2.8%. The result of the chi-square test reveals significant changes in the area coverage of the forest cover classification at P<0.05. Thus, it can be concluded that the afforestation project did not meet its objectives. There is need for sustainable programmes and policies towards alleviating poverty among the inhabitants of the study area most of which depend on the forest resources for livelihood. This should be followed up with policies to encourage tree planting initiatives to promote forest restoration and ecological integrity of the study area.
GIS-BASED SPATIAL MODEL FOR HABITAT SUITABILITY OF BABIRUSA (BABYROUSA CELEBENSIS), IN GORONTALO PROVINCE Rosyidy, Muhamad Khairul; Wibowo, Adi
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 4, No. 1
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Babirusa (Babyrousa celebensis) is an endemic animal from Gorontalo Province whose population is declining day by day due to poaching, land clearing, and selling babirusa meat in traditional markets in Gorontalo Province. Since 1931 this species has begun to be protected in Indonesia, and since 2008, International Union for Conservation of Nature (IUCN) named the babirusa species as a vulnerable category. This study aims to determine the suitability of babirusa habitat areas (Babyrousa celebensis) in Gorontalo Province with a Geographic Information System (GIS) approach and to determine the relationship of physical characteristics for the habitat of the babirusa habitat in Gorontalo Province. The variables are land use, slope, and elevation. The method used is GIS spatial modeling with overlay analysis. From the results of the analysis, it has concluded that a suitable area as a babirusa habitat is only about 33% of the total area of Gorontalo Province and there are types of land use in the wilderness and swamps at an elevation of 0-500 msl with sloping 0-8%. The validation test shows that Coefficient kappa is 0.16 and overall accuracy is 58%. Therefore, further research is needed by adding other variables to delineate the spatial distribution of babirusa
ASSESSMENT OF THE GROUNDWATER RECHARGE POTENTIAL AREAS USING GIS IN KAJOR KULON HAMLET, SELOPAMIORO, IMOGIRI, BANTUL, YOGYAKARTA Saputra, Deni Rahman; Yudono, Andi Renata Ade; Partoyo, Partoyo
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 4, No. 2
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Groundwater balance occurs in the presence of recharge and discharge. The process of entering the water in soil takes place with an infiltration-percolation to aquifers. The groundwater recharge area is identified by lithology, land use, slope, rainfall, land, and landform. Kajor Kulon Hamlet, Selopamioro Village, Imogiri Sub-district, Bantul Regency, Special Region of Yogyakarta becomes an area with hilly morphology, active fault areas, and including drought-prone regions. Change of the land function in hilly areas by making settlements and un-irrigation field for farming may cause decreased ability as a recharge area. Research aim sare to assessing, determining, and analyzing the conditions of the establishment in the research area. The variables used include land use, the slope of the land, rainfall, and soil texture as thematic maps to analysis its land ability. Data collection methods are measurement, inquiry, and mapping. Furthermore, the method of analysis is based on the Geographic Information Systems (GIS) with scoring-weighted overlay method. The results showed the classification of the between low, medium, and high. The medium class is currently occupying 67% of the area in the research area with an area of 719,916.03 m2 . The distribution of each class is expressed through the groundwater recharge area map. The GIS is very efficient and effective in facilitating groundwater recharge area analysis
SPATIAL ANALYSIS OF THE EFFECT OF LAND COVER CHANGES ON THE SOCIO-ECONOMIC POPULATION IN PARAKANSALAK DISTRICT, SUKABUMI REGENCY Taqyudin, Taqyudin; Efendi, Chairun Nisa; Supriatna, Supriatna; Restuti, Ratri Candra
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 5, No. 2
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Many land changes have occurred in Indonesia, especially in developing areas, so those rural areas can turn into urban areas. These changes can be felt directly by the community and have an impact on the social economy of the surrounding population. The importance of knowing the social and economic conditions of the community to know the conditions of regional development. Therefore, this study aims to determine changes in land cover in 2014-2020 and their effect on the social economy of the population in Parakansalak District. This research uses a descriptive quantitative method with spatial and statistical analysis in it. The techniques used in data collection were questionnaires, interviews, and observations, while the data processing techniques used the Google Earth Engine platform, ArcGIS software, Excel, and SPSS. The results of the study showed that changes in land cover partially affected the socio-economic status of 51%, with the most affected being jobs and incomes of residents in the Parakansalak District. Employment is affected by 68% and income is affected by 71% of land cover changes. The land cover that changed the most was agricultural land in Bojonglongok Village and Parakansalak Village. Therefore, the occupations of the surrounding residents also changed, such as some residents becoming traders, landlords, ranchers, teachers, and so on, and eventually, it also affected their income.
SPATIAL DISTRIBUTION PATTERNS ANALYSIS OF HOTSPOT IN CENTRAL KALIMANTAN USING FIMRS MODIS DATA Pratamasari, Adisty; Permatasari, Ni Ketut Feny; Pramudiyasari, Tia; Manessa, Masita Dwi Mandini; Supriatna, Supriatna
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 4, No. 1
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One of the ways to observe the hotspot created by forest fires in Indonesia is through Remote sensing imagery, such as MODIS, NOAA AVHRR, etc. Central Kalimantan is one of the areas in Indonesia with the highest hotspot data. In this research, MODIS FIRMS hotspot data in Central Kalimantan collected from 2017 – 2019, covering 13 districts: South Barito, East Barito, North Barito, Mount Mas, Kapuas, Katingan, Palangkaraya City, West Kotawaringin, East Kotawaringin, Lamandau, Murung Raya, Pulang Pisau, Seruyan, and Sukamara. That is four aspects that this research evaluated: 1) evaluating the spatial pattern using the Nearest Neighbor Analysis (NNA); 2) evaluate the hotspot density appearance using Kernel Density; and 3) correlation analysis between rainfall data and MODIS FIRMS. As a result, the hotspot in Central Kalimantan shows a clustered pattern. While the natural breaks KDE algorithm shows the most relevant result to represent the hotspot distribution. Finally, the hotspot is low correlated with rainfall; however, is see that most of the hotspot (~90%) appeared in low rainfall month (less than 3000 mm/month).
IMMIGRATION POLICY ANALYSIS FOR SOUTH KOREAN IMMIGRANTS ON ECONOMIC GROWTH IN THE WESTERN AREA OF UNITED STATED Damayanti, Diah Desita; Bishry, Rony Mamur
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 5, No. 2
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This study examines the analysis of immigration policy in South Koreans on economic growth in the Western Area of United States and explains which states have the potential to increase the economy in the Western Area of United States due to the economic contribution of South Korean immigrants. The data used are quantitative data and qualitative data. Quantitative data in the form of data on the population of the Western Area of United States per County, the number of South Korean immigrants per County, and the growth of income per capita per County. Meanwhile, qualitative data are in the form of various literature such as international news, scientific journals, government publications, as well as reports on immigration in the United States such as policies, immigration processes, economic growth, and South Korean immigrants living in the Western Area of United States. The method used is the congruent mixture method. collect and compile quantitative and qualitative data as well as obtain information from the interpretation process. The quantitative side uses a statistical test of South Korean immigrants on economic growth and uses cluster-outlier analysis in the GIS (Geographical Information System). Meanwhile, in terms of qualitative, quantitative test results will be elaborated with qualitative data by way of interpretation & triangulation of data as a whole. The results obtained are based on the highest number of South Korean immigrants where the high number of immigrants has an impact on grouping (clusters) and outliers (outliers) with high per capita income values in each county in the Western Area of United States as well from reading sources. In terms of validity, there are three locations, namely Los Angeles and Santa Clara in California, where the majority of immigrants work as business people, Honolulu in Hawaii, where the majority of immigrants work as sugarcane farmers, and King in Washington, where the majority of immigrants work as art workers and students
WILAYAH POTENSI IKAN PELAGIS PADA VARIASI KEJADIAN ENSO DAN NORMAL DI SELAT SUNDA Nurkhairan, Yulianti; Supriatna, Supriatna; Susiloningtyas, Dewi
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 2, No. 1
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Indonesia's geographical location resulted in the fisheries in the Sunda Strait also affected by global climate dynamics. One of them is the ENSO (El Nino-Southern Oscillation) phenomenon in the Pacific Ocean that affects the seasons and marine waters in Indonesia. The fishery in the Sunda Strait has a commodity of pelagic fish where potential area can be estimated from oceanographic parameters such as sea surface temperature (SST) and chlorophyll-a concentration in marine waters. The dynamics of the spatial and temporal parameter of oceanography due to the variation of ENSO phenomena can be identified from Aqua satellite images carrying the MODIS sensor. Information on potential areas of pelagic fish is needed to help the effectiveness of fishery activities and increase the production of capture fisheries. Monthly oceanographic parameters in the Sunda Strait are overlayed based on 4 seasonal variations in a year on each variation of the ENSO phenomenon and are classified by moderate, potential, and very potential classes. As a result, the potential areas of very potential pelagic fish in the Sunda Strait in the La Nina and El Nino phenomena are greater than in normal conditions and occur in the east seasons until the second transition. The spread is in the Indian Ocean to the west of the Sunda Strait.
EVALUASI DATA PULAU KABUPATEN LOMBOK TIMUR PROVINSI NUSA TENGGARA BARAT Destarina, R; Ardi, C S; Hanafi, Hanafi
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 1, No. 1
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The availability of a complete, accurate and up to date islands’ data and information can be a reference for the government in developing the potential of islands in Indonesia. National Team for Standardization Topographic Names (TNPNR) has standardized a number of 13.466 names in the Indonesian island Gazetteer in 2013, including 35 islands in East Lombok. A validation activity through field survey which was conducted in 2016 discovered the discrepancies in toponyms or existing status of several islands in the East Lombok. The wrong toponyms refer to a location that is completely different from the one requested. Therefore, it has fatal consequences and can hinder development. As a follow up, verification and standardization of islands’ name is conducted, which was attended by the Ministry / Agency member of TNPNR as well as the local government. Results of verification set forth in the official report stating that evaluation and correction of the data islands in East Lombok has been conducted, including adjustments of toponym, status and amount to 43 islands.

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